DNA analysis of blood found at a homicide crime scene was analyzed and yielded a profile for five STR regions
The frequency of occurrence of each STR type is shown in the table. Use the product rule to calculate the combined frequency of occurrence of the DNA profile given.
STR Repeats at STR Loci Frequency of Occurrence
vWA 17 0.21
FGA 21 0.35
TH01 6, 9.3 0.09
CSF1PO 11, 12 0.01
TPOX 8, 12 0.11
What will be an ideal response?
Answer:
Combined Frequency of Occurrence = 0.21 x 0.35 x 0.09 x 0.01 x 0.11 = 0.0000073 or 7.3 x 10-6 = 0.00073%
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